Switch audio input while operating above buttons; select the audio
signal input from corresponding video input to output it through Audio
OUT.
After selecting input signals, the input signal source you
currently selected such as “input=HDMI” will appear in the first line of LCD, while the status of current input signals will appear in the
second line of LCD. If there are no valid signals entered, the
message “no signal” will appear in LCD, and the corresponding
indicator will blink and dark screen appear; if the signal is valid, the
format of input signals such as “ 1080p_60Hz ” will appear in LCD.